I watched the documentary earlier on (thanks to Freddy for the link) and am overjoyed that this almost forgotten actress was given such attention and recognition. I have the book No Bells on Sunday, extracts from her diaries, and am inspired to read a few pages later.
Obviously, it's terribly sad and depressing that Rachel ended her life (I was unaware until Sian Phillips' harrowing revelation about the exact cause of her death) but I couldn't help being mesmerised by all that incredibly rare footage: a 1950s TV adaptation of Our Mutual Friend, acting opposite a young David McCallum; some TV plays, including one with Kenneth Griffith; the film Alpha Beta (which has a thread here), opposite Albert Finney; and FASCINATING excerpts of a hitherto unknown interview with Michael Parkinson.
I wish her strong presence was still here to show up these present stars.
A nice picture of Rachel in happier times - 7th April 1961 to be exact:
Rachel Roberts attending a reception at the Dorchester Hotel after the British
Film Academy Awards at which she was named Actress of the Year. 
(This was for
Saturday Night and Sunday Morning, again with Albert Finney)
She should have been a much bigger star, but most of her career was pretty distinguished:
Rachel Roberts,
Thanks also to threadstarter Julian for the initial post.